Model Tram Track Gauges

Model Trams

Model Tram Track Gauges

Model Tramway Track Gauges

For full-size tramways in Britain, standard gauge is 4' 8.5" but the narrower gauges of 4' 0", 3' 6" and 3' 0" were quite common, as shown on the list of British tramway systems. Some wider gauges were used abroad, such as the 5' 3" gauge in Dublin. These Imperial units have been converted to millimetres for easier comparison in the table below. On the continent, standard gauge and metre gauge are most common.

A wide variety of scales and gauges are in active use in Britain for model trams and tramways. The main track gauges used are given in the table below. The Actual Gauge column shows the Model Gauge multiplied by the Scale and gives a measure of the accuracy of the rail spacing for a particular scale. There are also many other narrow gauge variants on these scales and gauges as used by scratch builders.

Name Scale Model Gauge Actual Gauge Intended Gauge

7 1/4" Gauge 1: 8 184mm = 7 1/4" 1472mm Standard 1435mm

1: 5 184mm = 7 1/4" 920mm Metre 1000mm
1" Scale 1: 12 120.7mm = 4 3/4" 1448mm Standard 1435mm

1: 12 88.9mm = 3 1/2" 1067mm 3'6" = 1067mm

3/4" Scale 1: 16 88.9mm = 3 1/2" 1422mm Standard 1435mm

1: 16 66.7mm = 2 5/8" 1056mm 3'6" = 1067mm

5/8" Scale 1: 19.2 74.6mm = 2 15/16" 1433mm Standard 1435mm

1: 19.2 63.5mm = 2 1/2" 1219mm 4'0" = 1219mm

1: 19.2 55.6mm = 2 1/4" 1067mm 3'6" = 1067mm

G Scale 1: 22.5 45mm 1013mm Metre 1000mm

1/2" Scale 1: 24 60.3mm = 2 3/8" 1448mm Standard 1435mm

1: 24 44.5mm = 1 3/4" 1067mm 3'6" = 1067mm

3/8" Scale
1 Gauge 1: 32 44.5mm = 1 3/4" 1424mm Standard 1435mm

1: 32 32mm (= O track) 1024mm 3'6" = 1067mm

O Gauge British 1: 43.5 32mm 1392mm Standard 1435mm

Scale 7 1: 43.5 33mm 1435mm Standard 1435mm

1: 43.5 24.5mm 1066mm 3'6" = 1067mm

O Gauge 1: 45 32mm 1440mm Standard 1435mm

O Gauge USA 1: 48 32mm 1536mm Standard 1435mm

1: 50 32mm 1600mm Standard 1435mm

OO Gauge 1: 76 16.5mm 1254mm Standard 1435mm

OO9 1: 76 9mm 684mm Various Narrow

EM Gauge 1: 76 18.83mm 1431mm Standard 1435mm

- 1: 76 14mm 1064mm 3'6" = 1067mm

- 1: 76 12mm 912mm 3'0" = 914mm

- 1: 76 9mm 684mm 2'3" = 686mm

- 1: 76 8mm 608mm 2'0" = 610mm

HO Gauge 1: 87 16.5mm 1435.5mm Standard 1435mm

HOm Gauge 1: 87 12mm 1044mm Metre 1000mm

HOe Gauge 1: 87 9mm 783mm Narrow 760mm

TT Gauge British 1: 100 12mm 1200mm Standard 1435mm

TTn3 Gauge 1: 101.6 9mm 914mm 3'0" = 914mm

TT Gauge Continental 1: 120 12mm 1440mm Standard 1435mm

N Gauge British 1: 148 9mm 1332mm Standard 1435mm

N Gauge Continental 1: 160 9mm 1440mm Standard 1435mm

Name	Scale	Model Gauge	Actual Gauge	Intended Gauge
7 1/4" Gauge	1: 8	184mm = 7 1/4"	1472mm	Standard 1435mm
	1: 5	184mm = 7 1/4"	920mm	Metre 1000mm
1" Scale	1: 12	120.7mm = 4 3/4"	1448mm	Standard 1435mm
	1: 12	88.9mm = 3 1/2"	1067mm	3'6" = 1067mm
3/4" Scale	1: 16	88.9mm = 3 1/2"	1422mm	Standard 1435mm
	1: 16	66.7mm = 2 5/8"	1056mm	3'6" = 1067mm
5/8" Scale	1: 19.2	74.6mm = 2 15/16"	1433mm	Standard 1435mm
	1: 19.2	63.5mm = 2 1/2"	1219mm	4'0" = 1219mm
	1: 19.2	55.6mm = 2 1/4"	1067mm	3'6" = 1067mm
G Scale	1: 22.5	45mm	1013mm	Metre 1000mm
1/2" Scale	1: 24	60.3mm = 2 3/8"	1448mm	Standard 1435mm
	1: 24	44.5mm = 1 3/4"	1067mm	3'6" = 1067mm
3/8" Scale 1 Gauge	1: 32	44.5mm = 1 3/4"	1424mm	Standard 1435mm
	1: 32	32mm (= O track)	1024mm	3'6" = 1067mm
O Gauge British	1: 43.5	32mm	1392mm	Standard 1435mm
Scale 7	1: 43.5	33mm	1435mm	Standard 1435mm
	1: 43.5	24.5mm	1066mm	3'6" = 1067mm
O Gauge	1: 45	32mm	1440mm	Standard 1435mm
O Gauge USA	1: 48	32mm	1536mm	Standard 1435mm
	1: 50	32mm	1600mm	Standard 1435mm
OO Gauge	1: 76	16.5mm	1254mm	Standard 1435mm
OO9	1: 76	9mm	684mm	Various Narrow
EM Gauge	1: 76	18.83mm	1431mm	Standard 1435mm
-	1: 76	14mm	1064mm	3'6" = 1067mm
-	1: 76	12mm	912mm	3'0" = 914mm
-	1: 76	9mm	684mm	2'3" = 686mm
-	1: 76	8mm	608mm	2'0" = 610mm
HO Gauge	1: 87	16.5mm	1435.5mm	Standard 1435mm
HOm Gauge	1: 87	12mm	1044mm	Metre 1000mm
HOe Gauge	1: 87	9mm	783mm	Narrow 760mm
TT Gauge British	1: 100	12mm	1200mm	Standard 1435mm
TTn3 Gauge	1: 101.6	9mm	914mm	3'0" = 914mm
TT Gauge Continental	1: 120	12mm	1440mm	Standard 1435mm
N Gauge British	1: 148	9mm	1332mm	Standard 1435mm
N Gauge Continental	1: 160	9mm	1440mm	Standard 1435mm

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